No one calculates NBA box score stats at a per possession rate. The disparity between the fastest and slowest NBA teams isn't significant enough that any added accuracy* gained by normalizing points, assists, or turnovers (to use the examples from the graph below) to 100 team possessions rather than 36 minutes** isn't worth the extra effort.

But per 100 team possessions was the framework of the spreadsheet I've built upon and it's all I've got right now. I understand that it makes comparisons with other players in the league difficult. These graphs are a first step toward providing useful information (or, information usefully presented), not the last.

As always, please add any questions, suggestions, or additional compliments in the comments.